#include<bits/stdc++.h>
using namespace std;
int main(){
    freopen("color.in","r",stdin);
    freopen("color.out","w",stdout);
    int t;
    cin>>t;
    for(int i=1;i<=t;++i){
        int n,a[100000]={0},c[100000]={0};
        cin>>n;
        for(int j=1;j<=n;++j)cin>>a[i];
        cout<<"0"<<endl;
    }
    return 0;
}
